If I use a 750 with basic guidance to mark bad bits in some drains and don't need to go back to them for 5 years will satellite drift change where I have marked by any great distance or will it stay within a given distance ? . Busy repairing some poor work done 5 years ago and need to mark where other drains join in if I can Thanks

If I use a 750 with basic guidance to mark bad bits in some drains and don't need to go back to them for 5 years will satellite drift change where I have marked by any great distance or will it stay within a given distance ? . Busy repairing some poor work done 5 years ago and need to mark where other drains join in if I can Thanks

It'll still be somewhere near, drift isn't accumulative, it can go one way one day and come back again the next.

thanks graybo , That might make it easier if it needs doing againThe guy that tied in the old drains to the new pushed the pipes so far in to the new one that it all choked up , I want to mark the joins but hopefully repaired properly wont ever need them

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